Re: How do i catch the exception when it throws OutOfMemory Exception? - Java Discussion Boards

fuzzix12-Mar-10 7:31

12-Mar-10 7:31

for(Record r : yourArrayList)
{
printf("Name:%s\tAddress:%s\tBalance:%d\n",r.name,r.address,r.balance);
}

Note:i suppose that balance is integer so i used the "%d" format.

Re: printf() help?? [modified]

AmbiguousName12-Mar-10 20:20

AmbiguousName

12-Mar-10 20:20

yes, but which class to import? it shows an error saying that it can not find printf() method in java.lang.String, though i have also included the java.util.*

modified on Saturday, March 13, 2010 2:28 AM

modified on Saturday, March 13, 2010 2:31 AM

Re: printf() help??

Richard MacCutchan12-Mar-10 22:18

Richard MacCutchan

12-Mar-10 22:18

Did you read my previous reply?

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: printf() help??

AmbiguousName12-Mar-10 22:35

AmbiguousName

12-Mar-10 22:35

i did....and implemented it successfully as well. thanx.......

Re: printf() help??

Richard MacCutchan13-Mar-10 0:10

Richard MacCutchan

13-Mar-10 0:10

My apologies, but printf() is part of PrintWriter and may be accessed through System.out.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

How do i catch the exception when it throws OutOfMemory Exception?

Ram Bonala9-Mar-10 0:23

Ram Bonala

9-Mar-10 0:23

Please give any the reason that how it works?????

Re: How do i catch the exception when it throws OutOfMemory Exception?

KarstenK9-Mar-10 1:11

KarstenK

9-Mar-10 1:11

with the normal try/catch mechanismus. This exception should only get thrown if you allocate real hughe memory blocks ( maybe > 1 GB). If that fails your program isnt dead enough... Roll eyes | :rolleyes:

Press F1 for help or google it.
Greetings from Germany

Re: How do i catch the exception when it throws OutOfMemory Exception?

Richard MacCutchan9-Mar-10 1:16

Richard MacCutchan

9-Mar-10 1:16

The same way you catch any exception is the short answer. However, if you have an OutOfMemory condition then chances are that nothing (including catching the exception) will be possible any longer. In many cases your entire system will stop working for a while at least. Further details can be found here[^].

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: How do i catch the exception when it throws OutOfMemory Exception?

David Skelly9-Mar-10 1:38

David Skelly

9-Mar-10 1:38

Richard MacCutchan wrote:
The same way you catch any exception is the short answer

Out Of Memory is an Error, not an Exception. You need to catch either Error or Throwable for this, catching Exception won't work.

Re: How do i catch the exception when it throws OutOfMemory Exception?

Richard MacCutchan9-Mar-10 2:12

Richard MacCutchan

9-Mar-10 2:12

Well he asked how to catch it; the answer is in a catch() statement. I did not specify catch(Exception) in my answer, but left it to the questioner to check the details.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Diff between j3d and jgl?

002comp8-Mar-10 20:30

002comp

8-Mar-10 20:30

Hello friends
I am new to java3D so I installed j3d .
After that i cameto know abt jgl.
So i want to know that can I use both Libraries ?
If not then Is jgl easier than j3d to load 3d objects on web.
And one more jgl classses are quite same as j3d or totally different?

Thanks In Advance.
Regards
Yogesh

Custom Design Surface (Hosting a Designer) possible

akamper8-Mar-10 4:10

akamper

8-Mar-10 4:10

Hi
I am comparing possibilities for creating custom design surfaces (forms designer) for a course at university.
Example in C# WinForms: Have a Great DesignTime Experience with a Powerful DesignSurface (Extended) Class[^]

Is something like that possible in Java as well (i think so Wink | ;)

).
Do you know any examples/tutorials/references where I can find some information about it?

If you know any examples besides Java and C# WinForms I would appreciate it if you'll let me know.

Thank you

Re: Custom Design Surface (Hosting a Designer) possible

Richard MacCutchan8-Mar-10 21:42

Richard MacCutchan

8-Mar-10 21:42

Try a Google search, there are hundreds of Java tutorials on the web. The Java Tutorials[^] home page has a number to get you started.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Custom Design Surface (Hosting a Designer) possible

akamper8-Mar-10 22:33

akamper

8-Mar-10 22:33

Maybe you've misunderstood my intention of my question.

I am not looking for java programming tutorials or building simple Guis.
I am more looking for creating my own "Gui Builder" and if there a references, guidelines or tutorial for this case.

I've found GEF (Graphical Editing Framework) (http://www.eclipse.org/gef/overview.html[^]), I think this could help

Re: Custom Design Surface (Hosting a Designer) possible

Richard MacCutchan8-Mar-10 22:40

Richard MacCutchan

8-Mar-10 22:40

akamper wrote:
I am more looking for creating my own "Gui Builder"

Which is the same thing; and I'm pleased that you took my advice and searched for it.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Custom Design Surface (Hosting a Designer) possible

David Skelly9-Mar-10 1:57

David Skelly

9-Mar-10 1:57

You might also want to take a look at NetBean's Gui designer (Matisse). It is open source and you can download the source code from the NetBeans site to see how it works or to extend it and add in your own features if you want.

Re: Custom Design Surface (Hosting a Designer) possible

David Skelly9-Mar-10 2:04

David Skelly

9-Mar-10 2:04

Or you could look at the Abeille forms designer which takes a different approach to the same problem and which is also open source.

https://abeille.dev.java.net/[^]

Streaming data through Website

KenKen Wong7-Mar-10 13:11

KenKen Wong

7-Mar-10 13:11

Hi,

My coming project is to provide streaming data in stock market.
Currently, we are using request and response method in HTTP.

I read some company can provide streaming data smoothly by Java applet.
Can you have any reference or design guideline for me to implement it?

Thanks.

John

Re: Streaming data through Website

Nagy Vilmos7-Mar-10 21:47

Nagy Vilmos

7-Mar-10 21:47

Have a look at UDP, you will need to use this for the majority of your message content and then use TCP fpr handshakes and checksums.

Panic, Chaos, Destruction.
My work here is done.

or "Drink. Get drunk. Fall over." - P O'H

Re: Streaming data through Website

KenKen Wong8-Mar-10 18:50

KenKen Wong

8-Mar-10 18:50

Thanks for your idea.
However, it seems that UDP cannot guarantee the correctness of data.

Is there any standard format for data streaming?

Re: Streaming data through Website

Richard MacCutchan8-Mar-10 22:32

Richard MacCutchan

8-Mar-10 22:32

Try here[^] for explanations of what you can do with Java.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Streaming data through Website

Richard MacCutchan7-Mar-10 22:51

Richard MacCutchan

7-Mar-10 22:51

KenKen Wong wrote:
I read some company can provide streaming data smoothly by Java applet.

Well that would be a good place to ask your question, as they can probably explain what format the data comes in.

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Calling main() in Java???

AmbiguousName5-Mar-10 9:12

AmbiguousName

5-Mar-10 9:12

Hello guys....have you ever thought to call main() in another mathod of the same class...let me show an example

class A {
     public static void main(String [] args) {
         some code here....     
     }

     public void someMethod() {
          here i want to call main()
     }
}

Can we do that?? Basically im trying to simulate ATM Machine on Console...and you know we need to go back to original MENU when we are done with some transaction.

Re: Calling main() in Java???

Richard MacCutchan5-Mar-10 9:49

Richard MacCutchan

5-Mar-10 9:49

This is the wrong way to do it. Use your main() method to drive the application. If you need some function to execute repeatedly then either call it (if static) direct from main, or create a new object of the class and call its method(s) within some control loop. So in your sample above main() should create a new object of class A and repeatedly call someMethod().

txtspeak is the realm of 9 year old children, not developers. Christian Graus

Re: Calling main() in Java???

TorstenH.7-Mar-10 22:54

TorstenH.

7-Mar-10 22:54

I would prefer to go further:

ALLWAYS create another object in your main and work from the object or deeper.

Maybe this can help you too:

recursion ^

greets
Torsten

I never finish anyth...

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